Error: Data location must be "memory" for return parameter in function, but none was given

Question

I am unable to solve the error mentioned below.
Error: Data location must be "memory" for return parameter in function, but none was given. function fromHex(string memory s) public pure returns(bytes)

Please help to solve the same. Here is the code:

pragma solidity ^0.5.0;
contract SampleContract
{
    function fromHexChar(uint c) public pure returns(uint)
    {
        if(byte(c) >= byte('0') && byte(c) <= byte('9')) 
        {
            return c - uint(byte('0'));
        }
        if(byte(c) >= byte('a') && byte(c) <= byte('f'))
        {
            return 10 + c - uint(byte('a'));
        }
        if(byte(c) >= byte('A') && byte(c) <= byte('F'))
        {
            return 10 + c - uint(byte('A'));
        }
    }

    function fromHex(string memory s) public pure returns(bytes) 
    {
        bytes memory ss = bytes(s);
        require(ss.length%2 == 0);

        bytes memory r = new bytes(ss.length/2);
        for(uint i=0; i<ss.length/2; ++i)
        {
            r[i] = byte(fromHexChar(uint(ss[2*i]))*16 +         
            fromHexChar(uint(ss[2*i+1])));
        }
        return r;
    }
}

Answer 1

function fromHex(string memory s) public pure returns(bytes memory)